Some factors affecting cyclopropane acid formation in Escherichia coli.
1. The fatty acid composition of the extractable lipids of Escherichia coli varied with growth conditions. 2. The principal fatty acids were palmitic acid, hexadecenoic acid, octadecenoic acid and the cyclopropane acids, methylenehexadecanoic acid and methyleneoctadecanoic acid. 3. Cyclopropane acid formation from monoenoic acids was increased by acid media, poor oxygen supply, or high growth temperature. 4. Cyclopropane acid formation was decreased by alkaline media, well oxygenated conditions, the presence of citrate, or lack of Mg(2+).
D002849:Chromatography, Gas; D002951:Citrates / Q000378:metabolism; D003470:Culture Media; D003521:Cyclopropanes / Q000096:biosynthesis*; D004926:Escherichia coli / Q000378:metabolism*; D005227:Fatty Acids / Q000096:biosynthesis*; D006863:Hydrogen-Ion Concentration; D066298:In Vitro Techniques; D008274:Magnesium / Q000378:metabolism; D010100:Oxygen / Q000378:metabolism
D002951:Citrates; D003470:Culture Media; D003521:Cyclopropanes; D005227:Fatty Acids; D008274:Magnesium; D010100:Oxygen